The current study examined rDNA (internal transcribed spacer regions, ITS1 and ITS2) and cytochrome c oxidase subunit 1 (CO1) sequence data of Apatemon annuligerum (originating from two geographical locations) and A. gracilis metacercariae (originating from four natural piscine hosts) to determine the systematic status of these two strigeid digeneans. With the exception of short repeat motifs, the ITS1 regions sequenced demonstrated no intra- or interspecific sequence variation. ITS2 sequences were 292 bp and CO1 sequences 366bp in length and identical for both nominal Apatemon species. These sequence data provide strong evidence that the two species are con-specific and that A. annuligerum should be regarded as a junior synonym of A. gracilis.
All Science Journal Classification (ASJC) codes
- Animal Science and Zoology